Thanks for updating the demo to SVG-edit 2.6 stable so swiftly! :-)
However, it is not possible to activate all buttons on a tablet, in particular not ext-sozi button.
I don't know if the problem is in SVG-edit 2.6 stable, or in ext-sozi.
I noticed that ext-sozi uses Sozi 11.x, while Sozi dev is at version 13.x - can this be part of the problem?
The problem is present in Firefox and Chrome on the Android tablet, so the problem can also be with the browsers or Android itself, but since some buttons DO work I find this unlikely.